/* $OpenBSD: vmparam.h,v 1.1 2004/04/26 12:34:05 miod Exp $ */ /* * Mach Operating System * Copyright (c) 1992 Carnegie Mellon University * All Rights Reserved. * * Permission to use, copy, modify and distribute this software and its * documentation is hereby granted, provided that both the copyright * notice and this permission notice appear in all copies of the * software, derivative works or modified versions, and any portions * thereof, and that both notices appear in supporting documentation. * * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. * * Carnegie Mellon requests users of this software to return to * * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU * School of Computer Science * Carnegie Mellon University * Pittsburgh PA 15213-3890 * * any improvements or extensions that they make and grant Carnegie Mellon * the rights to redistribute these changes. */ /* * machine dependent virtual memory parameters. */ #ifndef _MACHINE_VM_PARAM_ #define _MACHINE_VM_PARAM_ /* * USRTEXT is the start of the user text/data space, while USRSTACK * is the top (end) of the user stack. */ #define USRTEXT 0x1000 /* Start of user text */ #define USRSTACK 0x80000000 /* Start of user stack */ /* * Virtual memory related constants, all in bytes */ #ifndef MAXTSIZ #define MAXTSIZ (8*1024*1024) /* max text size */ #endif #ifndef DFLDSIZ #define DFLDSIZ (32*1024*1024) /* initial data size limit */ #endif #ifndef MAXDSIZ #define MAXDSIZ (64*1024*1024) /* max data size */ #endif #ifndef DFLSSIZ #define DFLSSIZ (2*1024*1024) /* initial stack size limit */ #endif #ifndef MAXSSIZ #define MAXSSIZ MAXDSIZ /* max stack size */ #endif /* * Size of shared memory map */ #ifndef SHMMAXPGS #define SHMMAXPGS 1024 #endif /* * The time for a process to be blocked before being very swappable. * This is a number of seconds which the system takes as being a non-trivial * amount of real time. You probably shouldn't change this; * it is used in subtle ways (fractions and multiples of it are, that is, like * half of a ``long time'', almost a long time, etc.) * It is related to human patience and other factors which don't really * change over time. */ #define MAXSLP 20 #define VM_MIN_ADDRESS ((vaddr_t) 0) #define VM_MAX_ADDRESS ((vaddr_t) 0xffc00000) #define VM_MAXUSER_ADDRESS VM_MAX_ADDRESS /* on vme188, max = 0xf0000000 */ #define VM_MIN_KERNEL_ADDRESS ((vaddr_t) 0) #define VM_MAX_KERNEL_ADDRESS ((vaddr_t) 0x20000000) #define KERNEL_STACK_SIZE (3 * PAGE_SIZE) /* kernel stack size */ #define INTSTACK_SIZE (4 * PAGE_SIZE) /* interrupt stack size */ /* virtual sizes (bytes) for various kernel submaps */ #define VM_PHYS_SIZE (1 * NPTEPG * PAGE_SIZE) /* * Constants which control the way the VM system deals with memory segments. * The mvme88k only has one physical memory segment. */ #define VM_PHYSSEG_MAX 1 #define VM_PHYSSEG_STRAT VM_PSTRAT_BSEARCH #define VM_PHYSSEG_NOADD #define VM_NFREELIST 1 #define VM_FREELIST_DEFAULT 0 #ifndef _LOCORE /* * pmap-specific data stored in the vm_physmem[] array. */ /* XXX - belongs in pmap.h, but put here because of ordering issues */ struct pv_entry { struct pv_entry *pv_next; /* next pv_entry */ struct pmap *pv_pmap; /* pmap where mapping lies */ vaddr_t pv_va; /* virtual address for mapping */ int pv_flags; }; #define __HAVE_VM_PAGE_MD struct vm_page_md { struct pv_entry pvent; }; #define VM_MDPAGE_INIT(pg) do { \ (pg)->mdpage.pvent.pv_next = NULL; \ (pg)->mdpage.pvent.pv_pmap = PMAP_NULL; \ (pg)->mdpage.pvent.pv_va = 0; \ (pg)->mdpage.pvent.pv_flags = 0; \ } while (0) #endif /* _LOCORE */ #endif /* _MACHINE_VM_PARAM_ */